Passive acoustic monitoring of head disc interface interactions

Daugela, Antanas; Riddering, Jason W.; Boutaghou, Z. E.

doi:10.1007/s00542-008-0763-4

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…Actually, all of the current simulations on slider dynamics have used nonlinear physics models. However, all of the related experimental characterizations have used Fourier transform or wavelet transform to interpret data [1,2,5,6,92,93]. There are certain limits in these applications as the obvious gap between the simulation and experiment exists.…”

Section: Detection and Identification Of Nonlinear Dynamicsmentioning

confidence: 99%

“…The experimental investigations of transient dynamics of sliders have been widely conducted using laser Doppler vibrometer (LDV) signal, acoustic emission (AE)/PZT signal, and read/write signal. The analyses of nonstationary and nonlinear signals of slider dynamics have been implemented by using Fourier analysis-based time-frequency analysis (TFA) and wavelet transformation (WT) in HDDs area by industry and university labs [1,2,5,6,92,93]. For slider dynamics in nanometer clearance regime, the effects of air-bearing, intermolecular adhesion, contact and lubricant effect, as well as other factors yield nonlinear responses.…”

Section: Detection and Identification Of Nonlinear Dynamicsmentioning

confidence: 99%

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Sensing and Identification of Nonlinear Dynamics of Slider with Clearance in Sub-5 Nanometer Regime

Sheng

2011

Advances in Tribology

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This paper provides an overview of the problems pertaining to the sensing and identification of nonlinear dynamics of slider with clearance in sub-5 nanometer regime. This problem is complex in nature because the nonlinear dynamics of slider in sub-5 nanometer clearance regime involves different sources of nonlinear, nonstationary, and uncertainty characteristics. For example, the involved forces such as air-bearing force, intermolecular force, and contact forces are all nonlinear. The complex interface interaction with mobile lubricant makes the slider response be nonstationary. Furthermore, the interfacial parameters are available only by assumptions in the sense of statistics. Most of the reported studies either focused on physics-based simulations by using assumed interfacial parameters or focused on experimental characterization. The issues of the sensing and identification of the nonlinear dynamic properties of slider in nanometer clearance regime will be discussed with an aim at illustrating the promising approaches for improving the correlation between test data and physics-based simulations.

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